Manage OpenCode config via Rex

2 files changed, 77 insertions, 0 deletions

diff --git a/README.md b/README.md
index 3e71559..9b652fb 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,4 @@ Prompts are managed from `~/Notes/Prompts` and linked by `home_prompts` into eac
 - Codex CLI slash command path: `~/.codex/prompts`
 - Shared agent prompt paths: `~/.agents/{commands,skills}`
 - Codex CLI runtime config: `~/.codex/config.toml`
+- OpenCode runtime config: `~/.config/opencode/opencode.json` via `rex home`, using `OLLAMA_HOST` from `fish/conf.d/ai.fish` when available
diff --git a/Rexfile b/Rexfile
index b7d08b7..8587a23 100644
--- a/Rexfile
+++ b/Rexfile
@@ -1,5 +1,6 @@
 use Rex -feature => [ '1.14', 'exec_autodie' ];
 use Rex::Logger;
+use JSON::PP ();
 
 our $HOME = $ENV{HOME};
 
@@ -38,6 +39,65 @@ sub ensure {
     ( $dst =~ /\/$/ ? \&ensure_dir : \&ensure_file )->( $src, $dst, $mode );
 }
 
+sub configured_ollama_host {
+    my $ollama_host = $ENV{OLLAMA_HOST};
+
+    if ( !defined $ollama_host || $ollama_host eq q{} ) {
+        my $fish_config = "$DOT/fish/conf.d/ai.fish";
+
+        if ( open my $fh, '<', $fish_config ) {
+            while ( my $line = <$fh> ) {
+                if ( $line =~ /set -gx OLLAMA_HOST\s+(\S+)/ ) {
+                    $ollama_host = $1;
+                    last;
+                }
+            }
+
+            close $fh;
+        }
+    }
+
+    $ollama_host ||= 'http://hyperstack.wg1:11434';
+    $ollama_host =~ s{/\z}{};
+    $ollama_host =~ s{/v1\z}{};
+
+    return $ollama_host;
+}
+
+sub opencode_config_content {
+    my $base_url = configured_ollama_host() . '/v1';
+
+    return JSON::PP->new->ascii->pretty->canonical->encode(
+        {
+            '$schema' => 'https://opencode.ai/config.json',
+            'model'   => 'ollama/nemotron-3-super:latest',
+            'provider' => {
+                'ollama' => {
+                    'models' => {
+                        'gpt-oss:120b' => {
+                            'name' => 'GPT-OSS 120B'
+                        },
+                        'gpt-oss:20b' => {
+                            'name' => 'GPT-OSS 20B'
+                        },
+                        'nemotron-3-super:latest' => {
+                            'name' => 'Nemotron 3 Super'
+                        },
+                        'qwen3-coder:30b' => {
+                            'name' => 'Qwen3 Coder 30B'
+                        },
+                    },
+                    'name'    => 'Ollama',
+                    'npm'     => '@ai-sdk/openai-compatible',
+                    'options' => {
+                        'baseURL' => $base_url
+                    },
+                },
+            },
+        }
+    );
+}
+
 desc 'Install packages on Termux';
 task 'pkg_termux', sub {
     my @pkgs = qw/
@@ -148,6 +208,22 @@ task 'home_ghostty', sub { ensure "$DOT/ghostty/*" => "$HOME/.config/ghostty/" }
 desc 'Install ~/.config/lazygit';
 task 'home_lazygit', sub { ensure "$DOT/lazygit/*" => "$HOME/.config/lazygit/" };
 
+desc 'Install ~/.config/opencode';
+task 'home_opencode', sub {
+    my $opencode_dir = "$HOME/.config/opencode";
+
+    Rex::Logger::info( 'Deploying OpenCode config via ' . configured_ollama_host() );
+
+    file $opencode_dir,
+      ensure => 'directory',
+      mode   => '0750';
+
+    file "$opencode_dir/opencode.json",
+      ensure  => 'present',
+      content => opencode_config_content(),
+      mode    => '0640';
+};
+
 desc 'Install prompt links for AI tools';
 task 'home_prompts', sub {
     if ( -d "$HOME/Notes/Prompts/commands" ) {